"I was lucky enough to share the stage with this lady twice. Beautiful girl and absolutely fabulous physique.. So so sad. Thoughts and condolences with her family and friends. Xx"

Majella Duffy (Image: Facebook)

Another touching tribute reads: "Deeply saddened to learn of the passing of the beautiful Majella Duffy.

"She was beautiful inside & out - thoughtful, friendly, considerate - not a bad word could have been said about her."

Another friend said popular Majella was "too young to die".

He said: "R.I.P Majella Duffy too young to die... I got to know you briefly when you won your NIFMA World a couple of years ago and through Facebook chats, you seemed to be very nice and bubbly and very caring lady.

"I hope God has great plans for you."

Adventure holiday travel company Earth's Edge offered its condolences to the woman's family.

A spokesman said: "A client of ours passed away on the 14th July 2017 at 8.15 am local time while on Kilimanjaro.

"Our thoughts and condolences are with her family.

"We will provide further information on this incident in due course.

"James and all the team at Earth's Edge."

The Department of Foreign Affairs is providing consular assistance to the woman's family.